Liquid sample bulk mailing package device

ABSTRACT

A liquid sample bulk mailing packaging device includes a paperboard envelope blank assembled to form a hermetically sealed leakproof containment pocket that, in combination with proper alignment of a liquid containing packette enclosed inside, will prevent leakage in the event the enclosed liquid containing packette fails during mail processing. The device may include coupons printed on the envelope blank and seperable by perforations, and may be printed on both sides.

TECHNICAL FIELD

This disclosure generally relates to a bulk mailing packaging device and, more particularly, to a letter size bulk mailing packaging device with improved features to contain liquid samples.

BACKGROUND

Many manufacturers of cosmetics, toiletries, beauty and skincare products, etc. commonly promote their products by distributing free samples to current or potential consumers with the goal of building and/or maintaining customer loyalty for the products or product lines. One method of distributing such samples has been to give them to potential customers in a store in which the product is specifically sold. A more effective method has been mailing packages containing sample packettes to a targeted audience through the U.S. Postal Service (USPS).

Mail packages distributed through the USPS have been mailed either under a non-discounted rate classification or under a more economical bulk rate classification. To qualify for classification under the bulk mail rate, each mail package must comply with certain guidelines set by the USPS, including size requirements based on length, height and thickness, and further requiring the length/height aspect ratio be within a certain range. The requirements for obtaining the bulk mail rate are documented in the USPS Domestic Mailing Manual (DMM).

When the sample packette contains a fluid and/or volatile composition such as a liquid, USPS guidelines also require that the mailing package must be capable of being processed by bulk mail sorting equipment through delivery without leakage of any liquid. As used herein, “liquid” refers to any liquid, creme, lotion, color cosmetic, gel, paste, or other fluid product, and any aromatic, fragrance or other volatile product in any form, such as sachet, that could potentially leak or evaporate from the sample packette containing the liquid if the sample packette, which is the primary liquid retention device, fails at any point during bulk mail processing through delivery to the recipient. A liquid containing sample packette shall be referred to subsequently as a “sample liquid packette.”

Not later than May 2008 the USPS DMM requirements could be met by packaging, referred to as “cartons,” that were relatively thick (up to ¾ inch) and sturdy but which still qualified for a low bulk mail rate. Some bulk mailers utilized plastic to wrap liquid sample bulk mailing packages in order to meet liquid leakage prevention requirements. The USPS bulk mailing package requirements were changed as the USPS changed equipment. The new requirements were included with modifications to the DMM as the DMM was transformed into a series of documents dated May 2008, the entire series of DMM documents incorporated herein by reference in their entirety. In particular, section 201 for “Physical Standards” with its sub-subsection 1.1.1 for “Dimensional Standards for Letters” within subsection 1.1 for “Physical Standards for Machinable Letters;” its subsection 3.0 for “Physical Standards for Machinable and Automation Letters and Cards” with all its sub-subsections; and section 601 for “Mailability” with all its subsections are incorporated herein by reference in their entirety.

The net result of changes to the DMM in May 2008 was that cartons or plastic wrapping used for liquid sample bulk mailing packages were, at a minimum, subject to a substantially higher “large envelope” or “Not-Flat Machinable” bulk mail rate. A lower USPS machine-readable mailing rate applicable to letter size bulk mail is not available for plastic wrapped mailings and is available only for items up to ¼ inch thick that meet other size and flexibility requirements. Cartons are both thicker than ¼ inch and relatively rigid in construction, thus unable to meet the new requirements. Due to the increased costs of mailing through the USPS, manufacturers of liquid products subsequently sought alternative methods to place product samples, including distribution of samples in stores or other location frequented by likely customers, such as malls, convention centers, or cruise ships. Distribution through these methods are not as effective in reaching potential customers likely to purchase a product after trying a sample as previously used targeted mailings, which were based on customer information available to manufacturers and/or their marketers.

Accordingly, there is a need for a liquid sample bulk mailing packaging device that can meet the USPS requirements for obtaining the bulk mail rate for automated/machinable letters. There is also a need for a cost effective liquid sample bulk mailing package assembly method. There is also a need for a liquid sample bulk mailing package that can, without plastic wrapping around the external package surface, prevent leakage or evaporation outside the package in the event of failure of the sample liquid packette from the initial deposit of the package with the USPS through the mail sorting and delivery process to the ultimate recipient.

SUMMARY

A liquid sample bulk mailing packaging device, and method for assembling the device, is provided that enables mailing liquid samples under the US Postal Service requirements for machinable and automation letters. Paperboard panels hermetically seal a liquid sample packette such that moisture will not leak from the hermetically sealed section of the packaging device. In one embodiment, paperboard having sufficient absorption capabilities to absorb liquid in sample packettes is coated on the surface opposite where the packettes are placed such that moisture will not leak from an assembled package in the event of failure of the packettes during the mailing process and instead will be absorbed by the paperboard, in other embodiments the paperboard is coated and not absorptive while the hermetic seal is sufficient to prevent leakage from the assembled package in the event of failure of the packettes.

According to one disclosed embodiment, an envelope blank is provided with paperboard having a first side coated with a semi-permeable coating to form a printable surface, print media being placed on at least a portion of the surface and a moisture resistant coating placed on the print media and semi permeable coating, with a perforated coupon included in the envelope blank. The opposite, second, side of the paperboard is uncoated such that it can absorb moisture. A picture frame cut-out is made in a first panel extending from the top edge with a non-permeable window glued to the second side. A second panel extends from the first panel towards the bottom edge and has a liquid packette mounting area on its second side. In another embodiment, the opposite second side of the paperboard may also have a semi-permeable coating to form a printable surface, print media being placed on at least a portion of the surface and a moisture resistant coating placed on the print media and semi permeable coating.

According to another embodiment, a liquid sample bulk mailing packaging device uses an envelope blank made from paperboard having a semi-permeable coated first side that forms a printable surface, print media placed on at least a portion of the printable surface, and a moisture resistant coating overlying the print media and semi-permeable coating. The paperboard's second side may be uncoated, providing a moisture absorbing surface, or may be coated to enable print media to be applied to the second side. The envelope blank has a first panel extending from a top edge and a second panel adjacent the first panel. A sample liquid packette has a cover film laminated to a backing film and contains a volume of liquid. The sample liquid packette has a burst strength and provides the primary seal for containing the liquid during mailing. The sample liquid packette is glued to a packette mounting area on the second side of the second panel by a fugitive glue. A permanent glue is applied to the perimeter of the packette mounting area from a fold line between the first panel and the second panel, such that the sample liquid packette is encircled by the fold line and the permanent glue. The first panel is folded to, and glued to, the second panel packette mounting area. Once glued, a hermetic seal is formed around the sample liquid packette, providing a secondary seal to prevent any leakage of liquid from the sample liquid packette from escaping the liquid sample bulk mailing packaging device. The liquid sample bulk mailing packaging device is not greater than ¼ inch thick and is within the United States Postal Service requirements for automation letters. The liquid sample bulk mailing package device may include a perforated coupon or a separately attached coupon.

According to a further embodiment, a method of assembling a liquid sample bulk mailing packaging device involves providing an envelope blank formed from at least one side clay coated paperboard, and preprinted with print media on the at least one clay coated side to provide attractive and informational graphic presentations in a four panel area. A moisture resistant coating overlies the print media, and the first panel includes a non-permeable window glued to its second side. The envelope blank has a top, bottom, and first and second lateral edges. A first tab is cut along the first lateral edge in the first panel near a fold line between the first and second panels, and a second tab is cut opposite the first tab along the second lateral edge. A string is glued to the second side extending from the first tab to the second tab. A fugitive glue is applied to the second side of the second panel for placement of a sample liquid packette. A line of permanent glue is applied to the second side of the second panel around the sample liquid packette from a first fold line between the first and second panels such that when the first panel is folded and glued to the second panel a hermetic seal is formed around the sample liquid packette. Permanent glue is also applied around the periphery of the second side of the third panel and the fourth panel is folded and glued to it. A fugitive glue is then applied to the first side of the first panel, which is then folded towards the fourth panel so the first and fourth panels printed sides are glued together with fugitive glue, enabling easy opening by a mailing recipient. Addressee information is then printed in an address area on the first side of the second panel. This method enables an efficient, cost-effective assembly of letter size envelopes with sample liquid packettes enclosed for mailing at the low machinable, automation letter rate. In another embodiment the opposite second side may also be clay coated with print media provided in at least one of the four panel areas, and may include a perforated coupon in one of the third and fourth panels. In another embodiment, the bulk mailing packaging device consists of three panels, and may have a perforated coupon in either the third panel, extending from the window edge, or both.

Other features, benefits and advantages of the disclosed embodiments will become apparent from the following description of embodiments, when viewed in accordance with the attached drawings and appended claims.

BRIEF DESCRIPTION OF THE ILLUSTRATIONS

FIG. 1 is an illustration of a plan view of a first side of a die-cut blank for a liquid sample bulk mailing packaging device.

FIG. 1A is an enlarged schematic illustration of a partial cross-sectional view of the diecut blank taken along line 1A-1A of FIG. 1.

FIG. 2 is an illustration of a plan view of the second side of a die-cut blank of FIG. 1 partway through the assembly process.

FIG. 3 is an illustration of a plan view of the diecut blank of FIG. 1 after attachment of the sample liquid packette and partial assembly into a liquid sample bulk mailing packaging device.

FIG. 4 is an illustration of an assembled liquid sample bulk mailing packaging device.

FIG. 5 is an illustration of cross-sectional view of the assembled bulk mailing packaging device taken along lines 5-5 in FIG. 4.

FIG. 6 is an illustration of a plan view of a first side of a diecut blank for a liquid sample bulk mailing packaging device.

FIG. 6A is an illustration of a plan view of a first side of a diecut blank for another embodiment of a liquid sample bulk mailing packaging device using three panels.

FIG. 6B is an enlarged schematic illustration of a partial cross-sectional view of the diecut blank taken along line 6B-6B of FIG. 6 and FIG. 6A.

FIG. 7 is an illustration of a plan view of the second side of a die-cut blank of FIG. 6 partway through the assembly process.

FIG. 7A is an illustration of a plan view of the second side of a die-cut blank of FIG. 6A partway through the assembly process.

FIG. 8 is an illustration of a plan view of the diecut blank of FIG. 6 after attachment of the sample liquid packette and partial assembly into a liquid sample bulk mailing packaging device.

FIG. 8A is an illustration of a plan view of the diecut blank of FIG. 6A after attachment of the sample liquid packette and partial assembly into a liquid sample bulk mailing packaging device.

FIG. 9 is an illustration of an assembled liquid sample bulk mailing packaging device.

FIG. 10 is an illustration of cross-sectional view of the assembled bulk mailing packaging device of FIG. 6 taken along lines 10-10 in FIG. 9.

FIG. 10A is an illustration of cross-sectional view of the assembled bulk mailing packaging device of FIG. 6A taken along lines 10-10 in FIG. 9.

DETAILED DESCRIPTION

FIG. 1 shows an embodiment of a diecut envelope blank 10 for use in forming a liquid sample bulk mailing packaging device, illustrating a front, printed side 11 of the envelope blank 10. As shown in more detail in an enlarged schematic illustration of FIG. 1A, the envelope blank 10 is made from a paperboard 12 having a first side 14 with a semi-permeable coating 18, such as a clay coating, forming a printable surface 20 and on which print media 22 is placed on at least a portion. A moisture resistant coating 24, such as an aqueous coating, overlies the print media 22 and semi permeable coating 18, while a second side 16 of the paperboard 12 is uncoated on at least a portion, providing an absorbable surface area. While exaggerated for illustration purposes, the raw surfaces of paperboard 12 are not smooth, thus, the semi-permeable coating 18 enhances the ability to apply attractive print media 22.

As further illustrated in both FIG. 1 and FIG. 2, which depicts the back side 13 of the envelope blank 10 partway through the assembly process in making a liquid sample bulk mailing device, the envelope blank 10 has a top edge 60, a bottom edge 62, a first lateral edge 64, and an opposite second lateral edge 66. In the embodiment illustrated, a four panel envelope blank 10 is shown. A first panel 28 extends from the top edge 60 to a first fold line 44, a second panel 38 extends from the first fold line 44 to a third fold line 48, a third panel 40 extends from the third fold line 48 to a second fold line 46, and a fourth panel 42 extends from the second fold line 46 to the bottom edge 62.

The first panel 28 has a picture frame cutout 30 having print media on the printed side 11 providing an attractive display around a non-permeable window 32, such as a plastic or a metallized plastic film, adhered and sealed to the second side 16 of the paperboard 12, preferably by a permanent glue 34 that has been applied in a continuous line encircling the periphery 36 of the picture frame cutout 30. As used herein, a permanent glue is any adhesive that will bind with at least one of the contacting surfaces in a substantially permanent way such that removal of one surface from the adhered surface will pull a portion of the adhered surface material from its surface. In one embodiment, a first tab 68 is cut along the first lateral edge 64 in the first panel 28 proximate the first fold line 44 and a second tab 70 is cut opposite the first tab 68 along the second lateral edge 66 with a tear string 71 adhered by a permanent glue to the second side 16 extending from the first tab 68 to the second tab 70. In another embodiment, the second tab 70 could be omitted, and the tear string 71 would simply extend towards the second lateral edge 66. The tear string 71 is made from a material that when adhered to the paperboard 12 has a greater tensile strength than the paperboard material itself. In one embodiment, the tear string 71 is a string, such as a flat polyester ribbon about ⅛ inch wide, or any other string material available having sufficient tensile strength.

The second panel 38 includes on the printed side 11 an attractive and informational graphic presentation, a blank address area 74, a marking 75 meeting the USPS requirements indicating that a liquid sample is enclosed, and a bulk mailing permit 77. The back side 13 of the second panel 38 includes an uncoated portion of paperboard 12 providing a packette mounting area 26. A fugitive glue 72 is applied to the packette mounting area 26 by which a sample liquid packette 50 can be adhered to the second panel. As used herein, a fugitive glue is an adherent substance substantially holding two surfaces together but capable of releasing one surface from the other substantially without tearing material from a surface, as is known in the art. A line of permanent glue 37 is applied from the first fold line substantially around the periphery of the area for holding the sample liquid packette 50, such that when the first panel is glued to the second panel a substantially hermetic seal is formed around the liquid packette 50. In the embodiment illustrated, a line of permanent glue 37 extends from proximate the first fold line 44 at a point inward of the first tab 68 extending substantially diagonally outward, towards the first lateral edge 64, and then extending generally parallel to the first lateral edge towards the third fold line 48, then extending generally parallel to the third fold line 48 towards the second lateral edge 66, then extending generally parallel to the second lateral edge 66 towards the first fold line 44, then extending substantially diagonally inward to a point inward of the second tab 70.

The printed side 11 of the third and fourth panels 40, 42 may include attractive and informational graphic presentations, and the third panel may include an information block for coupon placement 80. The back side 13 of the third panel 40 includes permanent glue 41 provided around the periphery of the panel, proximate to and parallel with the second fold line 48, the third fold line 48, the first lateral edge 64, and a second lateral edge 66.

FIG. 3 shows a partially assembled liquid sample bulk mailing packaging device using the envelope blank 10 after adhering the sample liquid packette 50 to the packette mounting area 26 of the second panel 38, folding the back side 13 of the first panel 28 towards the second panel 38 along the first fold line 44 and gluing to it to the second panel, and folding the back side of the fourth panel 42 towards the third panel 40 along the second fold line 46, with the view rotated 180° from the views of FIG. 1 and FIG. 2 for clarity. A fugitive glue 72 is applied to spots on the first panel 28 proximate the first lateral edge 64, the first fold 45, and the second lateral edge 66, for adhering the first panel 28 to the fourth panel 42 on final assembly, and to an information block 80 for coupon placement. A coupon 78 including a coupon barcode 82 uniquely identifying the coupon is releasably adhered to the information block 80 by the fugitive glue 72. The sample liquid packette 50 is substantially covered by the nonpermeable window 32 and substantially hermetically sealed between the first panel 28 and the second panel 38 by the first fold line 44, and the line of permanent glue 37 surrounding the sample liquid packette 50, such that a substantially leakproof containment pocket 73 is formed around the sample liquid packette 50. The sample liquid packette 50 includes a cover film laminated to a backing film and contains a volume of liquid, the sample liquid packette having a burst strength and providing a primary sealing means for containing the liquid during mailing. It has experimentally been found that a burst strength less than 1000 pounds force applied to a platen over the surface of the packette is insufficient to meet the demands of the USPS letter size bulk mailing equipment. It has also been experimentally found that a burst strength of about 1500 pounds force applied to a platen over the area of the packette, also found to be a minimum of 22 psi, can meet the USPS requirements. In one embodiment, the sample liquid packette 50 includes three packette portions separated vertically as shown in the figures. Alignment of multiple packette portions vertically enables a manufacturer to provide samples of related products, such as a shampoo, a conditioner, and a cream. The tear string 71 shown in hidden lines provides an important convenience to consumers to allow them easy opening by simply pulling the tear string to tear the paperboard 12 from either end, the first tab 68 or the second tab 70, so that the liquid sample packette 50 can be removed from the sealed package. There are no perforations through the paperboard in between the first tab 68 and the second tab 70 so that the integrity of the moisture resistant coating 24 is intact over the hermetically sealed leakproof containment pocket 73 during the mailing process through delivery.

FIG. 4 shows a completely assembled liquid sample bulk mailing packaging device 51 as an envelope 52 formed from the envelope blank 10 after the coupon 78 is adhered to the information block 80 and the first panel 28 is folded along the third fold line 48 and glued to the fourth panel 42. The envelope 52 has a length 54 between 5 and 11.5 inches, a height 56 between 3.5 and 6.125 inches, and a thickness 58 as shown in the cross section of FIG. 5 no greater than 0.25 inches. An aspect ratio of the length divided by the height is between 1.3 and 2.5. In one embodiment, the length 54 is about 9 inches, the height 56 is about 6 inches, and the thickness 58 is no more than 0.25 inches. The liquid sample bulk mailing packaging device 51 has a weight no greater than 3.5 ounces, and has a flexibility sufficient to bend around an 11 inch diameter drum when subjected to a transport belt tension of 40 pounds. A targeted address 76 and associated address barcode 84 are applied to the address area 74 after successful completion of the assembly process including each of the first, second, and third folds to ensure the targeted address 76 can be linked to the coupon barcode 82 by a computer and stored in a computer database. Any envelope 52 that fails to complete the assembly process successfully can be discarded while ensuring targeted addresses with associated barcoded coupons are successfully included in the automated bulk mailing, thus enabling the manufacturer to efficiently mail samples and track coupon redemption directly to the consumer.

The liquid sample bulk mailing packaging device 51 shown in cross section in FIG. 5 illustrates the first panel 28 with its nonpermeable window 32 and second panel 38 forming a substantially leakproof containment pocket 73 in which sample liquid packette 50 is attached to the liquid packette mounting area 26. The sample liquid packette 50 has a cover film 86 laminated to a backing film 88 and holds a volume of liquid 90. The sample liquid packette 50 has a burst strength more than 1000 PSI and preferably at least about 1500 PSI as measured by ASTM testing method F-1140. In one embodiment, the paperboard 12 is solid bleached sulfate (SBS) clay coated, one side only, 0.012 inch thick. Print media is applied to the clay coated side, with an aqueous coating then applied to form the printed side 11. In the event the primary liquid retention from the sample liquid packette 50 fails, the liquid may leak into the substantially leakproof containment pocket 73 and may be absorbed by the paperboard 12. In order to absorb the liquid, the paperboard should have sufficient absorption capability to absorb the quantity of liquid contained within the sample liquid packette 50 with the semi-permeable coating 18 and the moisture resistant coating 24 preventing transmission of the liquid 90 by leakage or evaporation through the paperboard 12 from the deposit time of the liquid sample bulk mailing packaging device 51 with the USPS through the mail sorting and delivery process to the ultimate recipient. Thus, it is not required that a moisture resistant coating 24 have indefinite moisture resistant capabilities, but should be durable enough to retain the liquid for at least about two weeks. One advantage of using the system is that it meets the USPS requirements for machinable and automation letters, whereas plastic wrapped envelopes do not meet this requirement.

Absorption capabilities of paperboard 12 is measured by the Cobb value in grams per square meter. A minimum Cobb value relative to the moisture content of the liquid volume contained in the sample liquid packette 50 will be apparent to those skilled in the art based on the teachings herein. Portions of the back side of the envelope blank 13 including within the liquid packette mounting area 26 may have printing or ink applied so long as a Cobb value sufficient to absorb the moisture content of the sample liquid packette 50 is retained, as such is not application of a coating that would inhibit absorption beyond that necessary to meet the USPS requirements. A Cobb value of at least about 50 g per square meter has been found sufficient in combination with a printed surface having a clay coating and aqueous moisture resistant coating, as the combined effect is to absorb moisture while retaining the liquid for the time necessary for the mailing process to be complete.

FIG. 6 through FIG. 10A show embodiments that may have a clay coated second side 116 enabling high-quality print media to further enhance a liquid sample bulk mailing package device, with reference numerals depicting features as previously discussed with reference to the descriptions of FIG. 1 through FIG. 5.

FIG. 6 shows an embodiment of a diecut envelope blank 10 for use in forming a liquid sample bulk mailing packaging device, illustrating a front, printed side of the envelope blank 10, and including an optional coupon 178 that is detachable by means of perforations 179. While no perforations are permitted in panel portions surrounding a liquid sample, other panels or portions of a panel not in contact with the liquid sample may have perforations thus enabling a coupon to be printed directly on envelope blank 10. FIG. 6 shows a four panel embodiment with a coupon 178 in the fourth panel, while FIG. 6A shows a three panel embodiment with the picture frame cutout modified to include a coupon 178 detachable by perforations 179. One or both such coupons may be included in the envelope blank 10.

As shown in more detail in an enlarged schematic illustration of FIG. 6B the envelope blank 10 is made from a paperboard 12 having a first side 14 including a coating and printing configuration as previously discussed with respect to FIG. 1A but further having the analogous coating and printing configuration on second side 116, including a semi permeable coating 118, such as a clay coating, forming a printable surface 120 and on which print media 122 is placed on at least a portion. A moisture resistant coating 124, such as an aqueous coating, may overlie the print media 122 and semi permeable coating 118. While exaggerated for illustration purposes, the raw surfaces of the paperboard 12 are not smooth, thus the semi permeable coating 118 enhances the ability to apply attractive print media 122.

As further illustrated in FIGS. 6, 6A and FIG. 7, which depicts the backside 113 of the envelope blank partway through the assembly process in making a liquid sample bulk mailing device, similar to the backside 13 as previously shown in FIG. 2, print media is placed on second panel 38, third panel 40, and fourth panel 42, which can include a coupon barcode 182 on the backside of coupon 178. Fugitive glue 72 can be applied to one of the third panel 40 and/or fourth panel 42 to hold these panels together during the assembly process while allowing the recipient of the liquid sample bulk mailing package device to easily open the device to these panels and see an attractive and informational graphic presentation in these additional panel areas, which are unavailable for viewing if a permanent glue is used. A dual liquid sample packette 150 is shown having to portions or samples with a perforation 147 enabling the recipient to split the individual packettes for use individually. Packette 150 includes an easy opening feature, such as notches 149, to enable easy opening by the recipient. The opening feature on the packette is the weakest point for the packette and orientation with respect to forces applied in USPS sorting equipment is critical. While vertical orientation such as shown in FIG. 2 and FIG. 3 in combination with the necessary packette strength enabled successful processing when tested in USPS equipment, the same packettes would fail if the opening feature 149 was in a horizontal orientation and located at the aft end with respect to the direction of travel 200 (as shown in FIG. 9) through the USPS processing equipment. Tests confirmed that a packette 150 with the opening feature 149 located at the forward end (with respect to the direction of travel 200) fared better in tests, the result of rollers pushing the enclosed liquid aft as a device moves through the equipment and increasing the internal pressure such that a weak point such as the opening feature would fail. It has also been determined that the packette should not be too close to the leading edge. Current USPS equipment process bulk mail at speeds up to 300 pieces per minute, with a very rapid initial acceleration to the processing speed. This acceleration is enabled by rollers that grab the device imparting significant initial force to bring the device from zero to the operating speed in ⅕ of a second. It has been determined that there is a critical leading edge portion that must not include the sample liquid packette 50 so that the initial force enabling the high acceleration can be applied only to the paperboard 12. FIG. 7 similarly illustrates the backside 113 of a three panel envelope blank 10 with printing shown on the perforated coupon 178 of FIG. 6A.

Proper placement of packette 50 is illustrated in FIG. 8, FIG. 8A and FIG. 9. As illustrated in FIG. 8 and FIG. 8A, packette 50 has outline 105 shown as a hidden line with a packette leading edge 106 located a distance 114 from a device leading edge 110, distance 114 being greater than a critical leading edge clearance distance 112. Likewise, packette 50 must be located a minimum distance 128 from all edges to avoid damage from the mail processing equipment, such as shown for the distance 126 to the bottom edge 127 of packette 50.

Paperboard 12 coated on both sides enables additional panels to accept high quality printing, as compared to low quality printing that could be accomplished without any coating. While a coating on the backside of the paperboard will inhibit absorption of a liquid in the event of a failure of the primary liquid containment apparatus, the hermetic seal of the first and second panels by a permanent glue and non-permiable window has been determined sufficient to prevent leakage and damage to current USPS equipment. High quality printing on both sides enables better demonstration of products and services to prospective customers, and greatly enhances the ability to provide visual material that will better get the attention of the recipient of a liquid sample bulk mailing package device. The entire piece has a more upscale and high class finished look.

Further, experimentation has shown that the opening end of the packettes can be placed both in a vertical position and a horizontal position with the opening end of the packette as the lead edge as it travels through the USPS Automated Letter Sorting Equipment. Advantages are that artwork can be positioned in both a vertical and horizontal direction in the mailer which will give more options for attention getting graphics—including high quality graphics behind the packettes providing artwork and information when the packette is removed from the device. The packette will maintain its burst integrity by not allowing its opening feature to be the trailing edge going through the sorting equipment. It has been determined that a minimum clear distance from the leading edge for the packetter is at least 1″ and from all other edges at least ½″. Maintaining this clearance from edges will protect the packette from breaking and/or being damaged when travelling through the USPS mail delivery system including both automated equipment with roller bars and wheels and guide bars, and hand sorting/delivery.

While specific embodiments of the present invention have been described, it will be apparent to those skilled in the art that various modifications thereto can be made without departing from the spirit and scope of the invention. Accordingly, the foregoing description of embodiments of the invention are provided for the purpose of illustration only and not for the purpose of limitation, the invention being defined by the claims. 

What is claimed is:
 1. An envelope blank die-cut in a substantially rectangular shape for folding into an envelope having a length, a height, and a thickness when enclosing a sample liquid packette, comprising: paperboard having a first side, a second opposite side, a top edge, a bottom edge, a first lateral edge, and an opposite second lateral edge; the paperboard coated on the first side with a semi-permeable coating to form a printable surface; print media placed on at least a portion of the printable surface; a moisture resistant coating overlying the print media and semi-permeable coating; a first panel extending from the top edge having a picture frame cutout with a non-permeable window adhered to the second side; a second panel extending from the first panel with the second side having a liquid packette mounting area; a third panel extending from the second panel towards the bottom edge; a fourth panel extending from the third panel to the bottom edge; a first fold line between the first panel and the second panel; a second fold line between the third panel and the fourth panel; a third fold line between the second panel and the third panel; a first tab cut along the first lateral edge in the first panel proximate the first fold line; a second tab opposite the first tab and cut along the second lateral edge in the first panel proximate the first fold line; a tear string having a tensile strength greater than the paperboard tensile strength, the tear string adhered to the second side of the first panel extending from the first tab to the second tab; and the fourth panel including a perforated coupon.
 2. An envelope blank as claimed in claim 1 wherein the second panel second side further comprises at least a portion of the paperboard in the liquid packette mounting area coated with a semi- permeable coating to form a printable surface and print media placed on at least a portion of the printable surface.
 3. An envelope blank die-cut in a substantially rectangular shape for folding into an envelope having a length, a height, and a thickness when enclosing a sample liquid packette, comprising: paperboard having a first side, a second opposite side, a top edge, a bottom edge, a first lateral edge, and an opposite second lateral edge; the paperboard coated on the first side with a semi-permeable coating to form a printable surface; print media placed on at least a portion of the printable surface; a moisture resistant coating overlying the print media and semi-permeable coating; a first panel extending from the top edge having a picture frame cutout including a perforated coupon and with a non-permeable window adhered to the second side; a second panel extending from the first panel with the second side having a liquid packette mounting area; a third panel extending from the second panel to the bottom edge; a first fold line between the first panel and the second panel; a second fold line between the second panel and the third panel; a first tab cut along the first lateral edge in the first panel proximate the first fold line; a second tab opposite the first tab and cut along the second lateral edge in the first panel proximate the first fold line; a tear string having a tensile strength greater than the paperboard tensile strength, the tear string adhered to the second side of the first panel extending from the first tab to the second tab.
 4. An envelope blank as claimed in claim 3 wherein the second panel second side further comprises at least a portion of the paperboard in the liquid packette mounting area coated with a semi- permeable coating to form a printable surface and print media placed on at least a portion of the printable surface.
 5. A liquid sample bulk mailing packaging device comprising: the envelope blank of claim 1; a sample liquid packette comprising a cover film laminated to a backing film and containing a volume of sample liquid, the sample liquid packette having a burst strength and providing a primary sealing means for containing the sample liquid during mailing, the sample liquid packette adhered to the packette mounting area on the second side of the second panel by a fugitive glue; and a permanent glue applied to the perimeter of the packette mounting area from the first fold line, such that the sample liquid packette is encircled by the fold line and the permanent glue, the first panel folded to and glued to the second panel packette mounting area forming a hermetic seal around the sample liquid packette, the hermetic seal providing a secondary sealing means to prevent leakage of liquid from the sample liquid packette from the liquid sample bulk mailing packaging device; wherein the liquid sample bulk mailing packaging device is not greater than ¼ inch thick and has a device leading edge with respect to a direction of travel the liquid sample bulk mailing packaging device will move through US Postal Service bulk mail equipment.
 6. The liquid sample bulk mailing packaging device of claim 5 further comprising the packette having a leading edge and an easy opening feature located near the leading edge, wherein the packette leading edge is located a greater distance from the device leading edge than a critical leading edge clearance distance.
 7. The liquid sample bulk mailing device of claim 6 wherein the sample liquid packette is a dual liquid sample packette having two samples with a perforation enabling separation of the packette samples and further wherein the dual sample packette is oriented horizontally with respect to the packette mounting area.
 8. A liquid sample bulk mailing packaging device comprising: the envelope blank of claim 3; a sample liquid packette comprising a cover film laminated to a backing film and containing a volume of sample liquid, the sample liquid packette having a burst strength and providing a primary sealing means for containing the sample liquid during mailing, the sample liquid packette adhered to the packette mounting area on the second side of the second panel by a fugitive glue; and a permanent glue applied to the perimeter of the packette mounting area from the first fold line, such that the sample liquid packette is encircled by the fold line and the permanent glue, the first panel folded to and glued to the second panel packette mounting area forming a hermetic seal around the sample liquid packette, the hermetic seal providing a secondary sealing means to prevent leakage of liquid from the sample liquid packette from the liquid sample bulk mailing packaging device; wherein the liquid sample bulk mailing packaging device is not greater than ¼ inch thick and has a device leading edge with respect to a direction of travel the liquid sample bulk mailing packaging device will move through US Postal Service bulk mail equipment.
 9. The liquid sample bulk mailing packaging device of claim 8 further comprising the packette having a leading edge and an easy opening feature located near the leading edge, wherein the packette leading edge is located a greater distance from the device leading edge than a critical leading edge clearance distance.
 10. The liquid sample bulk mailing device of claim 9 wherein the sample liquid packette is a dual liquid sample packette having two samples with perforations enabling separation of the packette samples and further wherein the dual sample packette is oriented horizontally with respect to the packette mounting area.
 11. A liquid sample bulk mailing packaging device comprising: an envelope blank die-cut in a substantially rectangular shape for folding into an envelope having a length, a height, and a thickness when enclosing a sample liquid packette, the envelope blank comprising: paperboard having a first side, a second opposite side, a top edge, a bottom edge, a first lateral edge, and an opposite second lateral edge; the paperboard coated on the first side with a semi-permeable coating to form a printable surface; print media placed on at least a portion of the printable surface; a moisture resistant coating overlying the print media and semi-permeable coating; a first panel extending from the top edge having a picture frame cutout with a non-permeable window adhered to the second side; a second panel extending from the first panel with the second side having a liquid packette mounting area; a third panel extending from the second panel to the bottom edge; a first fold line between the first panel and the second panel; a second fold line between the second panel and the third panel; a first tab cut along the first lateral edge in the first panel proximate the first fold line; a second tab opposite the first tab and cut along the second lateral edge in the first panel proximate the first fold line; a tear string having a tensile strength greater than the paperboard tensile strength, the tear string adhered to the second side of the first panel extending from the first tab to the second tab; and a sample liquid packette comprising a cover film laminated to a backing film and containing a volume of sample liquid, the sample liquid packette having a burst strength and providing a primary sealing means for containing the sample liquid during mailing, the sample liquid packette adhered in a horizontal orientation to the packette mounting area on the second side of the second panel by a fugitive glue; and a permanent glue applied to the perimeter of the packette mounting area from the first fold line, such that the sample liquid packette is encircled by the fold line and the permanent glue, the first panel folded to and glued to the second panel packette mounting area forming a hermetic seal around the sample liquid packette, the hermetic seal providing a secondary sealing means to prevent leakage of liquid from the sample liquid packette from the liquid sample bulk mailing packaging device; wherein the assembled liquid sample bulk mailing packaging device is not greater than ¼ inch thick and has a device leading edge with respect to a direction of travel the liquid sample bulk mailing packaging device will move through US Postal Service bulk mail equipment, and further comprising the packette having a leading edge and an easy opening feature located near the packette leading edge, wherein the packette leading edge is located a greater distance from the device leading edge than a critical leading edge clearance distance.
 12. The liquid sample bulk mailing device of claim 11 wherein the sample liquid packette is a dual liquid sample packette having two samples with perforations enabling separation of the packette samples.
 13. The liquid sample bulk mailing device of claim 11 further comprising a fourth panel intermediate the third panel and the bottom edge and a third fold line between the third panel and the fourth panel, the fourth panel folded along the third fold line with the second side adhering to the second side of the third panel.
 14. The liquid sample bulk mailing device of claim 11 further comprising the second panel second side having at least a portion of the paperboard in the liquid packette mounting area coated with a semi-permeable coating to form a printable surface and print media placed on at least a portion of the printable surface.
 15. The liquid sample bulk mailing device of claim 14 further comprising the picture frame cutout including a perforated coupon.
 16. The liquid sample bulk mailing device of claim 13 further comprising the second panel second side having at least a portion of the paperboard in the liquid packette mounting area coated with a semi-permeable coating to form a printable surface and print media placed on at least a portion of the printable surface.
 17. The liquid sample bulk mailing device of claim 16 further comprising the fourth panel including a perforated coupon. 